Getting TDR Functionality on In-Service Cable Lines

By Tom Williams – One of the tough decisions facing line technicians is deciding if suspected line damage is severe enough to warrant taking cable service down to shoot the line with a time domain reflectometer (TDR). This decision is no longer necessary as it is now possible to measure a standing wave on a block of digital signals, and accurately range the distance to a fault on in-service plant using live digital traffic as test signals.

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